汉语中只有/un/,故就中国人来说将[声母+un]写成[声母+un]不成问题。韩语拼音方案即使不采取-un而采取-uen,其音值与发音方法也相同,都是先园唇后展唇的。这种音与韩语中的/un/音有一定差别。我们学外语时,往往用韩语中的累似音来套外语中的某种音。主要原因是我们沒有注意外语的发音情況,结果我们听到的音不是外国人真正发的那个音,而是经过母语语音系统影响而确认的音。韩国人听到的[声母+un]音,就不一定是中国人发出的音,而是经过负迁移而确认的音。 Chinese only / un /, so for Chinese people [initials + un] written as [initials + un] is not a problem. Korean pinyin program even if you do not take-u and take-uen, its sound and pronunciation methods are the same, are the first lip after the lab lips. This tone is somewhat different from the Korean / un / tone. When we learn a foreign language, we often use the tired tone in Korean to set a tone in a foreign language. The main reason is that we did not pay attention to the pronunciation of a foreign language. As a result, the sound we heard was not the sound actually made by foreigners, but the sound confirmed by the influence of the native speech system. The [initials + un] sounds that Koreans hear are not necessarily Chinese sounds, but negative ones.